ASTM F72 - 06

    Standard Specification for Gold Wire for Semiconductor Lead Bonding

    Active Standard ASTM F72 | Developed by Subcommittee: F01.07

    Book of Standards Volume: 10.04


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    Abstract

    This specification covers round drawn/extruded gold wires for internal semiconductor device electrical connections. The wires are available in four classifications, namely: copper-modified wire, beryllium-modified wire, high-strength wire, and special purpose wire. Aptly sampled wires shall be examined by test methods suggested herein, and each class shall conform correspondingly to specified requirements for chemical composition, mechanical properties (breaking load and elongation), dimension (diameter and weight), and workmanship and finish. The wires shall also undergo wire curl, wire axial twist, and wire roundness tests.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers round drawn/extruded gold wire for internal semiconductor device electrical connections. Four classifications of wire are distinguished, (1) copper-modified wire, (2) beryllium-modified wire, ( 3) high-strength wire, and (4) special purpose wire. Note 1Trace metallic elements have a significant effect upon the mechanical properties and thermal stability of high-purity gold wire. It is customary in manufacturing to add controlled amounts of selected impurities to gold to modify or stabilize bonding wire properties or both. This practice is known variously as "modifying," "stabilizing," or "doping." The first two wire classifications denoted in this specification refer to wire made with either of two particular modifiers, copper or beryllium, in general use. In the third and fourth wire classifications, "high-strength" and "special purpose" wire, the identity of modifying additives is not restricted.

    1.2 The values stated in SI units shall be regarded as the standard.

    1.2.1 A mixed system of metric and inch-pound units is in widespread use for specifying semiconductor lead-bonding wire. SI-equivalent values of other commonly used units are denoted by parentheses in text and tables.

    The following hazard caveat pertains only to the test method portion, Section , of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E16 Method of Free Bend Test for Ductility of Welds

    F205 Test Method for Measuring Diameter of Fine Wire by Weighing

    F219 Test Methods of Testing Fine Round and Flat Wire for Electron Devices and Lamps

    F584 Practice for Visual Inspection of Semiconductor Lead-Bonding Wire


    ICS Code

    ICS Number Code 29.060.10 (Wires)

    UNSPSC Code

    UNSPSC Code 26121500(Electrical wire); 32111700(Semiconductor devices)


    Referencing This Standard

    DOI: 10.1520/F0072-06

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM F72-06, Standard Specification for Gold Wire for Semiconductor Lead Bonding, ASTM International, West Conshohocken, PA, 2006, www.astm.org

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